<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <svg  height="210" width="500">
        <polygon points="100,50 250,190 160,210"
        style="fill:lime;stroke:purple;stroke-width:1"/>
      </svg>
</body>
</html>